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[llvm][DebugInfo] Adjust ModuleDebugInfoPrinter to versioned language names #167293

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Merged
merged 1 commit into from
Nov 11, 2025
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[llvm][DebugInfo] Adjust ModuleDebugInfoPrinter to versioned language names #167293

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18 changes: 12 additions & 6 deletions llvm/lib/Analysis/ModuleDebugInfoPrinter.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -43,13 +43,19 @@ static void printModuleDebugInfo(raw_ostream &O, const Module *M,
// filenames), so just print a few useful things.
for (DICompileUnit *CU : Finder.compile_units()) {
O << "Compile unit: ";
auto Lang =
dwarf::LanguageString(CU->getSourceLanguage().getUnversionedName());
if (!Lang.empty())
O << Lang;

DISourceLanguageName Lang = CU->getSourceLanguage();
auto LangStr =
Lang.hasVersionedName()
? dwarf::SourceLanguageNameString(
static_cast<llvm::dwarf::SourceLanguageName>(Lang.getName()))
: dwarf::LanguageString(Lang.getName());

if (!LangStr.empty())
O << LangStr;
else
O << "unknown-language(" << CU->getSourceLanguage().getUnversionedName()
<< ")";
O << "unknown-language(" << CU->getSourceLanguage().getName() << ")";

printFile(O, CU->getFilename(), CU->getDirectory());
O << '\n';
}
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22 changes: 22 additions & 0 deletions llvm/test/DebugInfo/Generic/debuginfofinder-cu-source-language-names.ll
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Original file line number Diff line number Diff line change
@@ -0,0 +1,22 @@
; RUN: opt -passes='print<module-debuginfo>' -disable-output 2>&1 < %s \
; RUN: | FileCheck %s

; CHECK: Compile unit: DW_LANG_C99 from /tmp/test1.c
; CHECK: Compile unit: DW_LNAME_C from /tmp/test2.c
; CHECK: Compile unit: unknown-language(0) from /tmp/test3.c

!llvm.dbg.cu = !{!0, !6, !10}
!llvm.module.flags = !{!8, !9}

!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "test1.c", directory: "/tmp")
!2 = !{}
!3 = !DIFile(filename: "test1.c", directory: "/tmp")
!4 = !DISubroutineType(types: !7)
!5 = !{null}
!6 = distinct !DICompileUnit(sourceLanguageName: DW_LNAME_C, producer: "clang", isOptimized: false, emissionKind: FullDebug, file: !7, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!7 = !DIFile(filename: "test2.c", directory: "/tmp")
!8 = !{i32 2, !"Dwarf Version", i32 4}
!9 = !{i32 1, !"Debug Info Version", i32 3}
!10 = distinct !DICompileUnit(sourceLanguageName: 0, producer: "clang", isOptimized: false, emissionKind: FullDebug, file: !11, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!11 = !DIFile(filename: "test3.c", directory: "/tmp")